Buscar
Estás en modo de exploración. debe iniciar sesión para usar MEMORY

   Inicia sesión para empezar

level: Memory

Questions and Answers List

level questions: Memory

QuestionAnswer
what are the 2 primary memory?RAM, ROM
what does RAM stand for?random access memory
What is the use of RAMit stores currently-in-use data. It is a volatile memory. It can be read from and written to
what is volatile memory?temporary memory
what happens as RAM gets full?processor has to access Hard-Disk-Drive to replace old data on RMM with new data
as RAM increase, what happen?faster the computer. RAM will never run out, it just gets slower overtime
what does ROM stand forRead Only Memory
What is ROM use?non-volatile memory used to store startup instruction for a computer system (BIOS). It can only be in read form
Why SSD over HDD?1. faster data access 2. more reliable (no moving parts) 3. thin and lighter in weight 4. don't heat up as much
What is A, B, C and D?A= Track B= Geometrical Sector C= Track Sector D= Custer
What does HDD stand for? What does it make use to store data?Hard Disk Drive. It makes use of magnetic disk to store data
How does HDD work?1. has number of platters which spin in 7000 times per second 2. Number of read-write heads have access to surface of platter 3. read-write heads move from center to edge 50 times per second 4. data is stored in sectors and tracks. Each sector has number of bytes
What is the disadvantage of HDD?1. latency 2. not suitable for high magnetic field environment 3. not suitable for moving environment 4. loud
What is optical storage?storage of data on an optically readable medium
What does CD and DVD stand for?Compact disk, digital versatile disk
What is SSD stand for and what does it make use of?Solid state drive, makes use of movement using electron (flash technology)(NAND chips)
What are the uses of secondary storageStore software and files (non-volatile)
What are 4 similarities of CD and DVD1. use a thin layer of metal and light sensitive organic dye to store data 2. both use single, spiral track which runs from center to edge of disk. On track, data is stored as pits and bumps 3. uses red lasers 4. both designated for R(write once) and RW(read and write multiple times)
How are DVD different from CD? (2)1. DVD has two layers (larger storage capacity) 2. two layers join together using transperant, polycarbonate spacer and thin reflector
What lasers does blue-ray use? What does it do?blue lasers, increase storage capacity because allows smaller pits and bumps
What does blue-ray disk come with? (security)encryption system, prevent copyright and copyright infringement
Describe blue-ray layerssingle polycarbonate layer, which avoids refraction of lasers
What is the advantages of USB flash memory?1. universal standard 2. only inserted one way, prevent incorrect connection 3. small portable 4. detects if correct driver installed
Describe magnetic off line storagee.g. external hard disk drive -use as backup or transfer of large files between devices
Describe solid-state storagee.g RAM stick, SSD, SD card -no moving parts (high speed flash memory) -quick data transfer -small